This new technical brief from the Aluminum Transportation Group details three different types of cosmetic corrosion and best practices for prevention.
Under some conditions, however, painted or unpainted automotive aluminum can develop one of three different corrosion types:
In most cases, aluminum corrosion is cosmetic in nature influencing paint retention. Corrosion of aluminum is predominantly surface corrosion and does not penetrate through the thickness of the material and does not weaken the structural integrity of the part. This short communication briefly explains each corrosion type and relevant preventative measures.